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  <title>查找指定字符在字符串中的最后一次出现</title>
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    <li><a href="index.html">PHP Manual</a></li>
    <li><a href="ref.strings.html">字符串 函数</a></li>
    <li>查找指定字符在字符串中的最后一次出现</li>
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<div id="layout">
  <div id="layout-content"><div id="function.strrchr" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">strrchr</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">strrchr</span> &mdash; <span class="dc-title">查找指定字符在字符串中的最后一次出现</span></p>

 </div>
 
 <div class="refsect1 description" id="refsect1-function.strrchr-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>strrchr</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$haystack</code></span>, <span class="methodparam"><span class="type">string</span> <code class="parameter">$needle</code></span>): <span class="type"><span class="type">string</span>|<span class="type"><span class="type false">false</span></span></span></div>

  <p class="para rdfs-comment">
   该函数返回 <code class="parameter">haystack</code> 字符串中的一部分，这部分以 <code class="parameter">needle</code>
   的最后出现位置开始，直到 <code class="parameter">haystack</code> 末尾。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.strrchr-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">haystack</code></dt>

     <dd>

      <p class="para">
       在该字符串中查找。
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">needle</code></dt>

     <dd>

      <p class="para">
       如果 <code class="parameter">needle</code> 包含了多个字符，那么仅使用第一个字符。该行为不同于 <span class="function"><a href="function.strstr.html" class="function">strstr()</a></span>。
      </p>
      
 <p class="para">
  Prior to PHP 8.0.0, if <code class="parameter">needle</code> is not a string, it is converted
  to an integer and applied as the ordinal value of a character.
  This behavior is deprecated as of PHP 7.3.0, and relying on it is highly
  discouraged. Depending on the intended behavior, the
  <code class="parameter">needle</code> should either be explicitly cast to string,
  or an explicit call to <span class="function"><a href="function.chr.html" class="function">chr()</a></span> should be performed.
 </p>

     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.strrchr-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   该函数返回字符串的一部分。如果 <code class="parameter">needle</code> 未被找到，返回 <strong><code>false</code></strong>。
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.strrchr-changelog">
  <h3 class="title">更新日志</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>版本</th>
      <th>说明</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>8.0.0</td>
      <td>
       不再支持将 <span class="type">int</span> 作为 <code class="parameter">needle</code> 传递。
      </td>
     </tr>

     <tr>
      <td>7.3.0</td>
      <td>
       弃用将 <span class="type">int</span> 作为 <code class="parameter">needle</code> 传递。
      </td>
     </tr>

    </tbody>
   
  </table>

 </div>


 <div class="refsect1 examples" id="refsect1-function.strrchr-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-4854">
    <p><strong>示例 #1 <span class="function"><strong>strrchr()</strong></span> 范例</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">//&nbsp;获取&nbsp;$PATH&nbsp;中不含磁盘符号的目录<br /></span><span style="color: #0000BB">$dir&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">substr</span><span style="color: #007700">(</span><span style="color: #0000BB">strrchr</span><span style="color: #007700">(</span><span style="color: #0000BB">$PATH</span><span style="color: #007700">,&nbsp;</span><span style="color: #DD0000">":"</span><span style="color: #007700">),&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//&nbsp;获取最后一行内容<br /></span><span style="color: #0000BB">$text&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"Line&nbsp;1\nLine&nbsp;2\nLine&nbsp;3"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$last&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">substr</span><span style="color: #007700">(</span><span style="color: #0000BB">strrchr</span><span style="color: #007700">(</span><span style="color: #0000BB">$text</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">10</span><span style="color: #007700">),&nbsp;</span><span style="color: #0000BB">1&nbsp;</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

   </div>   
  </p>
 </div>


 <div class="refsect1 notes" id="refsect1-function.strrchr-notes">
  <h3 class="title">注释</h3>
  <blockquote class="note"><p><strong class="note">注意</strong>: <span class="simpara">此函数可安全用于二进制对象。</span></p></blockquote>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.strrchr-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.strstr.html" class="function" rel="rdfs-seeAlso">strstr()</a> - 查找字符串的首次出现</span></li>
    <li class="member"><span class="function"><a href="function.strrpos.html" class="function" rel="rdfs-seeAlso">strrpos()</a> - 计算指定字符串在目标字符串中最后一次出现的位置</span></li>
   </ul>
  </p>
 </div>


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